| 摘要 |
<p>PURPOSE:To maintain the effect of a water seal by providing a large diameter section, a polygonal inflow cylinder which is connected to the large diameter section and a section of the lower part of which is twisted in the circumferential direction subsequently along the vertical direction, and a collecting section connected to the lower end thereof. CONSTITUTION:Drainage to be flowed into an inflow cylinder 13 from a riser 20 flows down along a side 13c curved in the shape of a spiral of the lower part 13a of the inflow cylinder 13. Then, the drainage flows down swiveling along a corner section 13d while it was flowing down along each side 13c. After that, the drainage flowing down through the inflow cylinder 13 is flowed from an outlet 12a to the inside of a large diameter section 1 and a collecting section 12 while maintaining a swiveling state, and it flows down along the circumferential surface of the large diameter section 1 and collecting section 12. Accordingly, an air axis is formed in the axial center section of assembly pipe joint 10, so that a variation in air pressure of the inside of a drain pipe can be reduced to prevent a water leakage of a trap.</p> |
